I've run JE pistons in my MX quad and love them. I've actually pulled some out after 25-35 hours of hard riding and they looked practically new (minus the burn on the top obviously). I know it's not the same as a car, but the brand is very reliable in my opinion.

 

If I would have to choose.

CP>Wiseco>JE/Manley

I know CP has great alloy properties that handle knock well. Also well as I think their piston skirts come coated.

Wiseco comes with all the bells and whistles (you can also get the HD varients custom made, I know because Wiseco HQ is 10 min from my house) Plus the skirts come coated.

JE I know many car get some piston slap/knock when cold.

Manley I don't have much info. So I but them near the bottom of the tier.


I think every engine builder has their preference. There is failures from all brands. But you have to also notice that if one has more failures. How many pistons do they make per year?

If I would build up a motor. I would probably go with some Wiseco or CP pistons and Manley Tuff Rods. That's just my 2 cents.

 

JE I know many car get some piston slap/knock when cold.

Confirmed but my tuner didn't complain about phantom knock during tuning.

 

^^ pretty much the way I'd rank it, but thats just based on what I've seen, not experienced. I'd also throw cosworth in there ranked equally, maybe a bit above CP

 

What's number #4? I only see 10, 11, 12 and 13.

 

i lol'd :bowlol:

 

dino likes Arias pistons.

 

I only just got it as well...

Your fault for not prefixing with 0x

 

My post couldn't have 0x in it, as my values were in decimal. Hence the joke...

I could have said 0x4, but 0x10 != 0xA

 

hrmmm well Wiseco are the cheapest of the lot aren't they?
That may or may not be significant...

 

I, too, would likely choose CP first. I have liked JE's customer service, fwiw. And currently using wiseco's in the race motor. But they all have a good product, so you can't go too wrong with which ever you choose.

 

so yours is noisy when cold?

my first preference is for JE (since Buschur and AMS use them), second is probably Wiseco..

but both will have deep relief, hopefully thicker deck and skirt coating...

 

so yours is noisy when cold?

My tuner said he could hear them during the initial start-ups. I can't tell since everything about my car is noisy. I have the Buschur version. The valve reliefs are deep...really couldn't imagine ever having piston contact.

 

Wiseco (What's in my car), Cosworth, JE, CP

 

My JE pistons never "made" noise. I trust AMS a lot which is why I used them.

My original build was going to use manley pistons but the coatings were taking forever. I'd run any of the pistons you mentioned honestly. CP was the first I thought about as my builder said they are awesome, but they didn't have a skirt coating for the X when I checked.

So I was just like screw it, AMS has the jE's in stock, going with those.

So basically I'd probably just go with what's in stock. MAP loves the weisco HD's and so do a few other shops...they are solid pistons, I'd consider them.

I guess I'd have a tough time choosing one over the other. Availability is basically what would make me pick one over the other.

 

Hollywood - do you have ANY issues with phantom knock?

I presume that as long as you stick to the manufactures tolerances they should all be fine...

might check that out now.. see what JE recommend vs Wiseco..

even though they are the same company now lol

 

No phantom knock from pistons, we did have some spool up tip in knock from compressor surge we needed to tune out.

 

Wisecos are going in mine. The HD variant, that is.

 

what is the deal with the HD varient?

also whats this about the "new" JE spec as well?

 

Wiseco has a line of Heavy Duty pistons for the Evo 8/9 etc. The X HD's are not an off-the-shelf product yet, but can be made to order which is what I chose. They are stronger and tolerances tighter as I am told.

 

Oh and deeper valve reliefs.

 

Yes, the HD variants have better alloy mixture. Better design. Overall a better piston designed to handle high HP applications better.

Can't really go wrong with CP or Wiseco's IMHO.

 

I didn't like the wiseco's I had in my protege... definitely a noisey piston.

The JE's I have in the evo are nice and quiet. No phantom knock either

 

Pistons aren't "just noisy." They make noise when there is too much clearance between the piston and the cylinder wall. Can't blame the piston, only the builder for not measuring the tolerances properly.

You might want to verify availability for 90mm, before you choose on a brand. That's a huge size, obviously, and it may well be several months before they'd be readily available.

^ For sure.

 

ive always used Wiseco for built dirtbikes, not saying much for evo but they have never failed me

 

You might want to verify availability for 90mm, before you choose on a brand. That's a huge size, obviously, and it may well be several months before they'd be readily available.

 

REVIVE! Just wanted to throw in my information. I'm currently running Manley pistons, 86mm, 9.0 compression. I'm running .003 clearance, if its cold enough, it'll be noisy. the nice part is though there isn't any knock of any kind so +1 for ease of tuning.

Is anyone running 10+ CP on pump? This is what i'm truly curious about.

 

Excellent, sub'd. I've been researching this lately, along with rods.

 

ERL had JE make me a custom piston for my build, once she is up and running I'll let you know how they perform.

Here is a few pics of one of them...

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ERL had JE make me a custom piston for my build, once she is up and running I'll let you know how they perform.

Looks great, what specifically did they modify to fit your build?

 

For what reasons are you guys going to custom pistons? It seems like there are quite a few instances of guys going the customer route vs off the shelf, but I've never seen many reasons for it.

 

Off the shelf will limit you to what you can build. For you to correctly choose the right piston you need to know several factors. Obviously the block height (some call it deck height), then your connecting rod length followed by crankshaft stroke length. This will give you your compression height which is the height of your piston from the center of the wrist pin. Leaving the piston choice till last will allow you to have a custom piston made to suit your build.

If you choose your piston first then you would have to build your motor around the piston which could be challenging and may result in a build that wont perform to your goals and expectations.


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We use custom pistons for our builds. Arias. The reason we go custom is because it allows us to tweak the design as we see fit.

CP pistons are also very good.

 

What's the higher HP 2.2L you guys have built?

 

I know this thread is old as hell, but I figured I would chime in.

Our shop has a very good relationship with CP/Pankl/Carrillo and we prefer their off-the-shelf 2618 alloy pistons for most builds. The block I just put together for a 6266-powered X has their pistons as will 2 of the following 4 motor builds we are doing in the next month. The off-the-shelf piston design from CP is very strong and is rated at 200 BHP per cylinder but of course can handle more. For the first customer to come to us wanting to make insane power, we will have CP produce custom pistons capable of handling at least 300 BHP per cylinder.

My own motor has AMS-spec JE pistons as I had a partial set of them lying around and they're technically a very good piston. I will be setting PTW at around 40 tenths so we'll see how much cold slap I end up with.

In general, skirt coatings are overrated as you'll find with any motor torn down with any significant mileage. The coating also affects how you set PTW initially, so as the coating wears thin, your PTW will grow larger.

 

This is great information. It would seem that there really isn't a bad choice to be made when considering a manufacturer.